Moved post to Modern watched forum.

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I'm new to this forum. I'm looking to buy a used 3511.50 and I found a bunch on ebay and online retailers. Looking at these currently. I'm thinking about buying it and then sending it to Omega for maintenance. Please help me decide which one would be the best way to go. Thanks.

https://www.ebay.com/itm/OMEGA-Spee...e=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649

https://www.ebay.com/itm/Omega-Spee...e=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649

https://www.ebay.com/itm/Authentic-...lt&brand=OMEGA&_trksid=p2047675.c100008.m2219

https://www.tourneau.com/watches/pr...nless-steel-automatic-1750043-VOM9701474.html
 
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I don't know that ref very well myself, but just word of advice, most people here will want to see watch images in-thread to evaluate, which is allowed for opinions - links tend to expire and/or cause other problems.

Good luck!
 
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A 7750 based Speedmaster isn't really what most of us on here would consider vintage got be honest, though I appreciate some are from the 1990s. You will get a better response posting this with pictures in the modern watches section.